Oil-burning furnace



T. GERRARD.

OIL BURNING FURNACE. APPLICATION FILED JUNE'Q, 19m.

I 1,394,164. Patented Oct. 18, M921.

3 SHEETS-SHEEI l.

di-kt orn y T. GERRARD.

OIL BURNING FURNACE.

APPLICATION FILED JUNE 9,1919.

' 1,394, 1 64. Patented Oct. 18, 1921.

3 SHEETS-SHEET 3.

Mj/K UNITED STATES THOMAS GERRARD, 0F CORTLAND, NEW YORK, ASSIGNOR OF ONE-HALF TO DANIEL- PATENT OFFICE.

KERNAN, OF CORTLAND, NEW YORK.

OIL-BURNING FURNACE.

Application filed June 9,

To aZZ whom it may concern:

Be it known that I, THOMAS GERRARD, a citizen of the United States, residing at Cortland, county of Cortland, and State of New York, have invented certain new and useful Improvements in Oil-Burning Furnaces, of which the following is a specification.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, which form a part of this specification.. Similar characters refer to similar parts in the several figures therein.

This invention relates to a furnace apparatus for burning crude or more less refined oil.

The principal object of the invention is to secure more perfect combustion and greater heating efliciency from the oil.

Other objects will appear in connection with the following description.

Figure 1 of the drawings is a central vertical longitudinal section of my improved oil-burning apparatus applied to an opening in the front wall of'an ordinary hot-air heating furnace, the plane of the section being indicated by broken line 1--l in Fig. 2.

Fig. 2 is a horizontal section of the same taken on the broken line 22 in Fig. 1.

-Fig. 3 is a cross section of the same taken onthe broken line 3-3 in Fig. 1.

Referring to the drawings wherein the invention is shown in preferred form, 1 represents an inclosure provided with an airinlet, 2, and with a gas-outlet, 3.

This inclosure may be mounted removably or permanently in connection with any heating apparatus into which the gases of combustion are to be directed.

I have shown the inclosure mounted upon a wall, 4, which may be the front wall or front door of an ordinary hot-air heater. The inclosure is thus mounted in such a manner that the gases of combustion will pass into the ordinary fuel-chamber of the heater.

The manner in which the inclosure will be combined with the apparatus in connection with which the heated gases are to be employed will vary in accordance with the nature of the particular apparatus in different cases.

In the construction shown in the drawings, the gas-outlet, 3', is at a lower level than the air-inlet, 2.

Within the inclosure are mounted a top Specification of Letters Eatent.

Patented Oct. 18, 1921 1919. Serial No. 302,713.

hearth, 5, a bottom hearth, 6, and an intermediate hearth, 7, all below the level of the air-inlet, 2, and in the general direction of the draft'in passing from the air-inlet, 2. to the gas-outlet, 3. I

The tophearth, 5, is thus mounted between the levels of said air-inlet and said gas-outlet. Each of the hearths, 6 and 7 has an oil-compartment, 8, and a water-compartment, 9. I have shown the top hearth, 5, as having only an oil-compartment.

The oil-compartments of the several hearths are adapted to receive and support pieces of oil-absorbing refractory material, 25, such as blocks or bodies of asbestos, magnesia orthe like. I have found that broken pieces of magnesia clay are satisfactory for this purpose.

Oil is supplied to the top hearth through a pipe, 10, which enters through the side wall of the inclosure, 1. and an excess of oil is delivered from the hearth, 5, by means of an overflow pipe, 11, to the oil-compartment in the next lower hearth, 7.

In a like manner an excess of oil is delivered from the hearth, 7, by an overflow pipe, 12, to the oil-compartment of the bottom hearth, 6. Excess of oil from the bottom hearth, 6, is delivered by an overflow pipe, 13, to a well or sink, 14, in the bottom of the inclosure, whence it is carried by a pipe, 15, to a point outside of the inclosure.

Water is supplied to the water-compartment of the hearth, 7, by means of a pipe, 16, and excess of water is delivered from the hearth, 7, to the water-compartment of the hearth, 6, by means or an overflow pipe, 17.

Excess of water is delivered from watercomp'artment of hearth, 6, by an overflow pipe, 18, to a well or sink, 19, in the bottom of the inclosure, whence it is carried by a pipe, 20, to a point outside the inclosure.

The lower hearths, 7, and 6, extend successively greater distances toward the front of the inclosure, 1, away from the gas-outlet, 3.

The hearths are slidably mounted upon racks, 21, and can be slid into and out of position within the inclosure through an opening closed by a door, 1*, which forms part of the front wall of the inclosure.

A flue-space, 22, is formed outside of the front wall of the inclosure-proper, access to which flue can be had through an opening closed by a door, 23, corresponding subthrough the pipe, 11, to the oil-compartment combination, an inclosure provided with an by a damper-door,

the admission of the draft to the inclosure at a point above the respective hearths, whereby oil burning on the hearths is exposed to a downward draft of air as the air passes from the inlet, 2, to the gas-outlet, 3.

The operation of the apparatus is as follows:

The hearths having been provided with the absorbent refractory material, 25, a supply of oil is admitted through pipe, 10, upon 'the'refractory material in hearth, 5. The

oil on hearth, 5, is then ignited, the doors, 1 and23, are closed and the damper, 24, is opened. A draft of air is thuscaused to pass through the air-inlet, 2, downwardly to 1 ing separate compartments for oil and for the hearth, 5. V V 7 As the combustion of the oil proceeds, a high degree of heatis produced, causing a draft of considerable force to pass from theair-inlet 2, through the inclosure and the,

gas-out1et, '3, and thence to a stack orchimney (not shown) by. flues or other means with which the particular furnace apparatus, 4, is provided.

The supply of oil is continued through the pipe, 10, to the hearth, 5, until it overflows of the hearth, 7, and if the maximum eflicicncy of the apparatus is desired, the flow of oil from pipe, 10, is so regulated that the overflow from hearth, 5', supplies an excess of oil to hearth, 7, the overflow from which.

is supplied by pipe, 12, to the bottom hearth, 6.v r a By controlling the flow of oil to the pipe, 10, by means of a valve, 26, combustion can be maintained on the hearth, 5, alone, or on the hearths, 5 and 7, alone or on all three hearthsJ When very high temperatures aremaintained it is desirable to bring the highly heated gases into contact with a supply of water, and this I accomplish by delivering through pipe, 16, a supply of water to the water-compartment of hearth, 7, the overflow from which passes to the water-compartment of the hearth, 6. V By regulating the supply of water through the pipe, 16, by means of a valve, 27, I can maintain a supply of water in'the watercompartment of hearth, 7, alone, or in the water compartments of both hearths, 7 and 6. v r

The draft canbe regulated by opening the damper-door, 24, more or less or byany ordinary form of damper. V V V 7 What I claim as new anddesire to secure by Letters Patent is' '1. In an oil burning. apparatus and in combination, an inclosure provided with an air-inlet, and with a gas -outlet; a plurality of oil-burning hearths mounted one above 7 to the oil-compartment of said lower hearth; means for supplying water tothe water-compartment of saidlower hearth; and overflow means for separately conveying an excess of oil from said oil-compartment and an ex- 7 cess of water from said water-compartment to pointsoutslde the inclosure.

2. In an oil-burn ng apparatus and in air-inlet, and with a gas-outletat a lower level than said air-inlet; a plurality of oilburning hearths mounted oneabove another within said inclosure all below the level of a greater distance than thetop hearth away from said gas-outlet; and means for supplying oil to said hearths,

r In testimony whereof I have hereunto set my hand this 3rd day of'June', 1919.

{THOMAS GERRARD.

said air-inlet with a lower hearth extending J 

